Twins general manager Terry Ryan met with manager Ron Gardenhire on Wednesday to discuss which players they'll bring up on Saturday when the rosters expand.
The Twins need a starter for Sunday, as left-hander Scott Diamond is currently serving a six-game suspension for throwing a pitch near the head of Rangers outfielder Josh Hamilton last week.
"We'll have somebody here for that, definitely," Gardenhire said. "Somebody will be here to pitch. We don't exactly have him here right now, let's put it that way."
A likely candidate to make the start is right-hander Esmerling Vasquez, who has been impressive at Triple-A Rochester. The 28-year-old has posted a 2.78 ERA with 98 strikeouts and 38 walks in 100 1/3 innings.